增加Human Capital,改写Solow Model为:y = (Ah)^(1-α) * (k^α); 其中,h 为人力资本;假定Cobb-Douglas生产函数,且完全竞争市场(资本回报为边际产出),易证:
h(West) / h(East) = y (West) / y (East) * [ k(east) / k(west) ] ^ α;
再考虑到人力资本的“外部性”(即:你周围人如果productive,会带来正相关影响),有:
资本回报率: r(West) / r(East) = [ y(West) / y (East) ] ^ (α-1/α) * [ h(West) / h(East) ] ^ (γ/α),其中,γ为外部性参数(external effect).
我没有具体的实证数据,只能提供个思路。如果你有数据,带入上式,小于“1”,就说明:r(West) < r(East).
LZ如果感兴趣,推荐一篇文章:Why Capital Doesn't Flow From Rich Countries to Poor, by Robert. Lucas, 请自行Google吧。


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